Various sizes. Around 18-24.5mm.  Can be bigger or smaller.  please refer the coin. 

The example number 3:  Fine texture. No crack. No hairline. One color root.

others: Not round enough, not smooth round. small notches, processing marks, cotton areas, not evenly thickness, rough surfaces, and 

Pendant holder and chain: Alloy.

Without a certificate but 100% natural Hetian jade is guaranteed. 

If you want a thread with it, please let me know with an order message. Thanks

Final sale. No return. No refund. No exchange.
Final sale. No return. No refund. No exchange.
Final sale. No return. No refund. No exchange.